Passive sonar multi-target azimuth trace extraction method, electronic equipment and computer readable storage medium

Abstract

The invention relates to the technical field of sonar image processing, in particular to a passive sonar multi-target azimuth trace extraction method, electronic equipment and a computer readable storage medium. The method comprises the following steps: expanding an original azimuth course image to obtain an expanded azimuth course image; setting a window, sequentially obtaining a series of windowimages on the extended azimuth course image, and performing Radon transformation on each window image to obtain a coefficient matrix R; partitioning each matrix R into blocks; extracting a peak pointof each block in each matrix R; normalizing the obtained peak points of each matrix R to obtain a matrix N; performing inverse Radon transformation on the matrix N to obtain an initial target azimuthtrace in the matrix R, and marking the initial target azimuth trace as a matrix T; performing binarization processing on the matrix T to obtain a matrix M; calculating an azimuth trace point detection frequency threshold according to the window size and the window translation pixel point number, and purifying the matrix M according to the azimuth trace point detection frequency threshold to obtain a final target azimuth trace; and intercepting a corresponding part of the original azimuth course graph to obtain an extracted multi-target azimuth trace.

Description

Technical field [0001] The invention relates to the technical field of sonar image processing, in particular to a passive sonar multi-target azimuth trace extraction method, electronic equipment and computer readable storage medium. technical background [0002] Bearing Time Recording,BTR) is an important information presentation method of passive sonar, which reflects the space-time information of target signal and background noise. With the development of vibration and noise reduction technology, the radiated noise of ships is getting lower and lower, and the target azimuth trace in passive sonar azimuth history diagram is becoming less and less obvious, which affects the target detection and azimuth estimation. There are three main methods to extract target azimuth trace from multi-beam output results: azimuth trace extraction method based on peak detection, azimuth trace extraction method based on Hidden Markov Model,HMM) and azimuth trace extraction method based on spatial t...

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Problems solved by technology

[0010] The purpose of the present invention is to propose a passive sonar multi-target azimuth extraction method, electronic equipment and computer-readable storage medium, through the passive sonar multi-target azimuth extraction method to solve the complex and changeable underwater environment existing in the prior art. There may be omissions or outliers when the peak point is detected. When the background noise is large, the existing azimuth extraction method based on peak detection will fail, and although HMM has a good modeling ability for the correlation between the front and rear states, but This kind of azimuth extraction algorithm has the technical problem that the amount of calculation will increase rapidly with the increase of the number of target azimuths

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